b.magnetic viscosity, tendency on the part of a magnetic medium to retard the magnetizing force.
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reluctance1888
reluctancy1888
magnetic viscosity1892
reluctivity1892
1892 Electr. Engineer 16 Sept. 287/1 Up to the frequency tried—i.e., about 125 per second—there is no sign of magnetic viscosity; the magnetic cycle is unaffected [etc.].